Gearing



D. F. AsBURY July 1.o, 1928.

GEARING Filed Feb. 27, 1926 `2 sheets-sheet D. F. ASBURY July 10, 1928.

' GEARING Patented `luly 10, 1928.

UNITED stars FEC i GEARING.

Application filed February 27, 1926.' serial Nojemea My inventionrelatesv to adjustable means adapted to bev arranged between a movablepart and an operator therefor whereby movement of a predeterminedportion of the 0perat-or at a constant rate of speed may be caused tomove the movable part at different Vvariable speeds, my inventionfinding particular utility in connection with the collective operationof the movable parts of a. plu'- rality of radio'tuning units, whichtuning unit parts as a rule require variablev movement with respect toone' another to cause them to tunev simultaneously with different wavelengths;

More particularly my invention consists in the provision of anarrangement in which a part to be moved is equipped with a .memberhaving peripheral contact with an operator,

and an eccentric for shifting the position ofv the member with respecttothe movable part to vary the distance betweenthe latter and anyselected point in the periphery of the member, wherebyl a predeterminedamount of movement of the operator may be caused to impart differentamounts of movement to the movablepart.

As directed to the operation of Athe movable parts of radio tuningunits, my present invention is designed as an improvement in certainrespects over the means disclosed for example in my prior applications683,756; 690,795-and 80,833 for causing the movable parts of anpluralityof tuning units to be moved varying amountswith respect to one anotherduring collective operation of such units, and in other respects is animprovement over the adjustable means for alike purpose disclosed lforexample in my prior applications 89,441; 89,442 and89,443, my

present arrangement `being designed with particular reference tosimplicity lof construction, cheapness andease of manufacture andfacility of adjustment.

My inventive idea w,is capable ofeinbodiment in different mechanicalstructures, certain of which are illustrated in the accompanyingdrawings, but it is to be understood that the structures shown aremerely intend-A Aed to disclose'the essential features and novelcharacteristics of my invention in certain j preferred forms and that.its scope is as `devlined in the appended (claims.

In the drawings, wherein like characters .of reference denotecorresponding parts in the different views Fig. lis anelevationfshowinfan ada-pta- A tion of my invention to each or' aplurality of radio tuning units connected together for collectiveoperation;

Fig. 2, a plan view of the structural arrangement shown in F ig'. 1;

Fig. 3,- an 3&3 of Fig. 1;

Fig.' 4, a. detail perspective of the eccenf enlarged sectionv on theline eccentric element I mount a gearjwheel 14 Q and an arm 16. Gearwheel 14 is free with respect to4 eccentric element 12, so as toberotatable with respect thereto at any time, while any preferred meansmay be employed, such, for example, as a set screw 18 threaded in arm 16for contact with eccentric elementv 12 toV secure said arm in anyrotatably adjusted position with respect to said eccen- -f tric element.Likewise, any vpreferred means may be employed to secureeccentricelement l12 in any desiredv rotatably adjusted position with respect toyshaft 10, a preferred means consisting as shown of a screw 26 threadedinthe end of shaft 10, said screw havingv a tapered'head and said yshaftbeing split for a. portion of its length whereby tightening of saidscrew will spread said` shaft against said eccentric member. f

Arm 16 has rotatably mounted therein a shaft 22 carrying an eccentric24which is received ina slot 26 in gear wheel 14, and an operatinghandle 28 is provided onshaft 22 for rotating same, the resultl beingthat if gear wheel 14 is held against movement andl handle 28 is rotatedto rotate eccentric 24, saideccentric will react from said gear wheel toswing arm 16 and thus rotate shaft '10 due to the fact that said `arm issecuredV tol eccentric-element 12 and said eccentric element is securedto said shaft. On the other hand, if gear wheel 14 is rotated Vitsrotation will be transmit-ted through eccentric 24, arm 16 and eccentric12 to shaft lim 10, provided, of course, some means is employedl tohold-'eccentric 24 against rotation with respect to arm 16, such meansbeing provided in this instance in the form Vof a Aspring washer 30interposed between handle 28 and'V arm 16 and engaging these parts Ywith` sufficient friction to hold eccentric`i24 against rotation when ltated.

.The hole in gear wheel 14 that receives-eccentric 12 preferably isconcentric with respect tothe periphery of said gear wheel, and thelatter prcferablyis of circular shape although it may be of irregularshapeifdesired, 'the vessential characteristic of my invention inv sofar as these features are concerned 'being that by rotatably adjustingecgear wheel 14 is ro- ,K centric 12 on shaft 10 any desired point inthe periphery of gear wheel 14 Vmay `beV shifted `towards `or away fromshaft 10 whereby a predetermined amount of movement of an operatorengaging the periphery of said gear wheel be caused to impart different'amounts of rotation to shaft 10, it

' centric 12, so that irrespective of the rotated position of saideccentric with respect to shaft 10, said arm may .be lrotatably adjustedonsaid eccentric to bring pointer k32 in alinement with aV desiredgraduation 34. Otherwise arm 16 might be formed as an integral part ofeccentric 12.V or be permanently secured thereto. l

In Figures 1 and 2 I have shown a plurality of tuning units constructedasv 'dey scribed and. arranged for collective operation by a commonoperator in the form of a rack bar 36 engaging the periphery of the gear14 of each Aunit,said rack bar being flexible and being supported byyieldably mounted Y *i VThe intermediater gear wheel 14 is shownV Y andshaftV 10so`that if the rack bar isshifted vrollers 38 whereby it willremain 'in driving Contact with each gear wheel despite eccentricmovements ofthe sam-e during rotation thereof.

in Fig. 1 as adjusted by its eccentric 12 to the greatest distancepossible `between the point on its periphery in contact with rack bar 36in either direction the speedof shaft 10 will progressively `increaseduring movement of Athef'rack'bar at a constant speed. The lefty 'handgear wheel- 14 as viewed in Fig. 1 is shown on the other hand as being'adjusted by its eccentric so that its speed will be mcreased as rack'bar 86 yis-moved tothe left and decreased as said rack bar is moved tothe right, nubile the right hand gear wheel 14 as viewed in Fig. 1 isshown adjusted by its eccentric 12, so that its speed will be decreasedas racl; bar 36 is moved to the left and increased assaid rack bar ismoved to the right. Thus it is apparent ,that by properly adjustingeccentrics 12 a given amount of movement of rack bar 36 may be' causedto move the movable'part of each-tuning `unit substantially the exactamount required to cause all units to tune simultaneously 'with anygiven wave length, Adespite the .fact .that more or less movement yofone or more of the Amovable parts with. respectto another may berequired to accomplish thisYresult.

The eccentrics '24 provide 5 Vernier means' whereby 'the movable partsofthetuning units maybe indivfidually adjusted, since L'in any plural unitarrangement embodying more than two units the resistance of'the movableparts of a pluralityoffunits will always be present to hdldrackbar andconsequently thegear wheel 14 of the 'unit'to be Vindividually adjustedagainst movement, so that any given eccentric 24 will react vwhenvrotated from its associated gear wheel 14 to rotate its associated'sha-ftl 1K0."

In Figures 5 and 6 of the vdrawings I have 'shown anarrangement which'isessentially the same as thel preferred arrangement'illustrated inFigures 1 lto 4, but which dilfers from said preferredarrangement'inith'atri-nstead of varm v16 carrying anieccentricv 24operating in a slot in gear :wheel '14, said arm is equipped with 'apinion 40 engagi'ngthe peripheral teeth of said gear wheel. lOtherwisetheconstruction and mode of operation isv the same asy described .1nconnection with the preferred form of my invention.

I claim: f

1. In mechanismof the class describetha rotatable shaft, an eccentricrotatably adjustable` on said shaft, agear wheel rotatably adjustable onsaid eccentric, and a rack for driving said gear.

i2.. In mechanism of the class described, a

rotatable shaft, yan eccentric rotatablyl adj ustable on Said'shaft, amember carried byfsaid eccentric, and means operable through said member'and said eccentric to drive said l i 'izo shaft.

3. In mechanism of the class described, a rotatable shaft, an eccentricrotatably v' adlea lou

justable on said shaft, a 'disk' intatablyV adn justable on .saideccentric, and al reciprocal.,A

operator engaging the periphery of said disk for rotating same.

4. In mechanism of theA class described, a rotatable shaft, a diskcarried 'by said shaft, a reciprocal operator engaging the vperiphery ofsaid disk for rotating same,'and Vadjustable means whereby anypredetermined point in the periphery of said disk may be shifted towardsand away from said shaft.

5. In mechanism of the class described, a movable part, a memberrotatable to move said movable part, a flexible reciprocal op- Vproducedifferent amounts of movement of said movable part.

6. In mechanism of the class described, a movable part, a memberrotatable to move said movable part, a. reciprocal operator coactingwith the periphery of said member for rotating same, means for shiftingthe axis of rotation of said member withV respect to the peripherythereof and yicldable means holding said operator in driving` engagementwith the periphery of said member.

7. In mechanism of the class described, a plurality of movable parts, amember associated with each movable part for moving the same, anoperator for moving said members collectively, and eccentric means foradjusting said members whereby a predetermined amount of movement ofsaid operator may be caused to produce varying amounts of movement ofsaid movable parts with respect to one another.

8. In mechanism of the class described, a plurality of movable parts, amember associated with each movable part rotatable to move the same, anoperator coacting with the peripheries of a plurality of said membersfor rotating same, andmeans for adjusting said members whereby the sameco- .actionof said operator with a predeter-v mined portion of theperiphery of each member may be caused to produce varying amounts ofmovement of said movable parts with respect to one another. j

9.In mechanismof the class described, a rotatableshaft, an eccentric onsaid shaft, a member rotatable on said eccentric, a second membersecured against rotation with respect to said shaft and said eccentric,and.

means connecting said members operable to rotatably adjust them'vvithrespect to one another.

10. In mechanism of the class described, a rotatable shaft, an eccentricmounted for rotatable adjustment on said shaft, means to secure lsaideccentric to said shaft, a member at all times rotatable onsaideccentric, a second member mounted for rotatable adjustment on saideccentric, means to secure said second member to said eccentric, andmeans connecting said members` operable to rotatatably adjust them withrespect toone another. f

In testimony whereof I hereunto aiiix my signature.

DoRsEY F. AsBURY.

